Fetch Screen Content

Retrieve TRMNL image data, device-free.

PreviousIntroduction NextFetch Plugin Content

Last updated 9 days ago

Fetch Screen Content

Retrieve TRMNL image data, device-free.

First, set up a TRMNL device or .

Next, grab your API Key from and make a request like below.

Auto advance content

This endpoint is used by our firmware (on your device) to fetch new screen content. Making a request to this endpoint automatically 'advances' your Playlist to the next item in your queue. To simply grab the current screen instead, skip to the next section below.

curl https://usetrmnl.com/api/display --header "access-token:xxxxxx"

This will respond with several fields, for example:

{
  "status"=>0, # will be 202 if no user_id is attached to device
  "image_url"=>"https://trmnl.s3.us-east-2.amazonaws.com/path-to-img.png",
  "image_name"=>"plugin-YYYY-MM-DD-TXX-XX-XXZ-hash",
  "update_firmware"=>false,
  "firmware_url"=>nil,
  "refresh_rate"=>"1800",
  "reset_firmware"=>false
}

The image_url is likely the most interesting to you, as this may be leveraged by your own hardware to render content however you see fit.

Note: TRMNL devices send a few additional values in the request headers by default, such as your WiFi connection strength (RSSI value), firmware version (ex: 1.3.7), and more.

These attributes impact the response content by instructing the device to either update firmware, change its refresh rate, and so on. But excluding these values from your request is OK, just be aware that some response values may be nil.

Current screen

curl https://usetrmnl.com/api/current_screen --header "access-token:xxxxxx"

This will respond with the following fields:

{"status" => 200,
 "refresh_rate" => 1800,
 "image_url" => "https://usetrmnl.com/rails/active_storage/blobs/redirect/hash-here/plugin-YYYY-MM-DD-TXX-XX-XXZ-hash",
 "filename" => "plugin-YYYY-MM-DD-TXX-XX-XXZ-hash",
 "rendered_at" => nil
 }

PreviousIntroduction NextFetch Plugin Content

Last updated 9 days ago

{ "status"=>0, # will be 202 if no user_id is attached to device "image_url"=>"https://trmnl.s3.us-east-2.amazonaws.com/path-to-img.png", "image_name"=>"plugin-YYYY-MM-DD-TXX-XX-XXZ-hash", "update_firmware"=>false, "firmware_url"=>nil, "refresh_rate"=>"1800", "reset_firmware"=>false }

{"status" => 200, "refresh_rate" => 1800, "image_url" => "https://usetrmnl.com/rails/active_storage/blobs/redirect/hash-here/plugin-YYYY-MM-DD-TXX-XX-XXZ-hash", "filename" => "plugin-YYYY-MM-DD-TXX-XX-XXZ-hash", "rendered_at" => nil }